if any issue I'd see with em, would be, the extended auger assembly.
the playa is quite dense, once you get down a foot or so.
But, as long as the center rod is good strong steel, it should grab and hold fine.
Also, it seems to depend on the angle of attack on the auger.
Some, for me, seem to "screw in" better than others. The only difference bing the angle of the auger bite.